Solar Design Review / Help
Hi all! I'm putting together a solar charging design for my older Class A RV. I've upgraded my 2 12V Marine Deep Cycle batteries to 4 Lifeline 6V Golf Cart AGM Batteries. Got them all wired up with...
Forum Discussion
Just get some MC4 "Y" connectors and skip the combiner box. Then get some MC4 cable with #8 wire to pull down to the controller. Plug and play.
No fuse needed on the panel side. All wire exceeds the panel supply potential. A dead short will not even warm the wire and no harm to the panels. Although a switch to cut power for service could be helpful.
AGM is not exempt from venting requirements to meet RVIA and NEC standards. But I would do same as you.
25 amp fuse to the battery is small. Need 50 amp fuse on the positive close to the battery. 40a x 1.2 = 48 ~50a. I recommend a 50a Bussmann high-amp breaker that can be switched off for service. #6 wire is fine for that short distance.
40a controller is fine IMO.
That is my two cents. If it seems odd maybe I misread something.
No fuse needed on the panel side. All wire exceeds the panel supply potential. A dead short will not even warm the wire and no harm to the panels. Although a switch to cut power for service could be helpful.
AGM is not exempt from venting requirements to meet RVIA and NEC standards. But I would do same as you.
25 amp fuse to the battery is small. Need 50 amp fuse on the positive close to the battery. 40a x 1.2 = 48 ~50a. I recommend a 50a Bussmann high-amp breaker that can be switched off for service. #6 wire is fine for that short distance.
40a controller is fine IMO.
That is my two cents. If it seems odd maybe I misread something.
